AM I PREGNANT ? think i'm 4months pregnant ????

ok so i don't know if i'm pregnant... back in september i had unprotected sex with my boyfriend and, i wasn't really worried at the time if i'd be pregnant... i didn't get my period for a good 2 months at that time and i had a brown discharge then 3 weeks later i get my period in a mucus like form.. time passes by i forget about it and i don't pay attention because i get my period normally for a 2nd time ( let me mention when u was 2 months late i took 3 preg test and they all came out neg ) , so basically i forget i have no symptoms at least any "serious" ones... and, so a couple weeks ago i started feeling very sick to the stomach like at random times i'd feel the need to throw up but i wouldn't.. and i remembered that i should've already of gotten my period like a week or 2 ago and there are no signs of it coming.. then i start to feel something move in my stomach but  i don't pay attention to that but it kept going so i finally thought about it and what came to my head is that i'm pregnant and that my hCG is very low.. that could be why all my test where neg and why i have barley any symptoms , please help ( also i feel like the universe has been giving me signs , i see a lot of preg vids on youtube in my feed which i never have and a lot more) i know sounds silly but please i need help .